﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo02
{
    class Shape
    {
        protected string color;

        public string Color
        {
            get { return color; }
            set { this.color = value; }
        }
        public virtual void GetArea(double radius)
        {
            
        }
    }
}
